Lock mechanism of breech-loading guns.



. igsoarsl f. A. LONDON, ENGLAND.l f

'f 1"? To all'whom mycmcern:

` fBev it known that we,S1rAn'rHUR TREVOR DAWSON, knight, and GEORGE THOMAS Buon- HAM',fboth subjects of the King of Great Britain, residing at Vickers House, Broadway, lVi/"estminstenin the county ofLondon, AEngland, have' invented certain new and useful Improvements in or Relating to the yLock Mechanism of Breech`I1oadingv Guns, of which the followingis a specification.

v,This invention relates to lock mechanism y of thekind inwhich a primer magazine 0r hopper occupies a stationary position at one side of the vent` axial and the lock frame has a mouth Tor opening formed in it above the forward portion of the bolt sleeve so that lwhen .the lock frame is moved into its fully f open position, the bolt sleeve will liebefneath' the exit opening of the magazine or I hopper from which a primer will fall kthrough the mouth or opening in the'lock A,frame on to the top of the bolt sleeve.

.According to the kpresent invention the :primer magazine or hopper is arranged in r` such afposition that its outlet opening is situated above and at one side of the bolt "1 sleeve when the lock frame is in its fully open position so that although a primer can J descend through the mouth or opening in i I'the lock frame to rest on the forward part -of theibolt sleeve, it can not enter the outyletop'ening ofthe hopper as a result of the y .slamming of the breech screw carrier and .c'annot thereby prevent the lock frame from c beingolosed, since when the primer jumps g during 'the slamming of the carrier, it will *bear against the portion of the box slide thatis above :the bolt sleeve and 'contigu ous to the said outlet opening.

c Y lIn order that' the said invention may be f clearly understood and readily carried into l .,eiie'cuiwewill describe thesame more fully `W'ithfreference to theaccompanying drawu rFigure 1 is a sectional rear elevation showmg ma more or less dlagrammatlc manner l a constructional form of our improvements,

" the parts being in the position they occupy a when the look frame is closed and the bolt `locked.

' Fig. 2 is a view similar to Fig. 1 showing UNrTEn srArEs PATENT oErioE. i

- 'AR'JJIIUE'l TEEvoRl DAWSON AND GEORGE THOMAS BUCKHAM, or wEs'rMINsrER, i 4LoNnoN,ENGLAND, AssreNoEs To vrcKERs LIMITED, oriwEs'r'i/Lrirsrna,`

' vLoox MECHANISM or.BREEoH-LOADLTG. Guns?,

l Specification of Letters Patent. Patented May 6,1919. Tj

Appiication med Apri113,1915. ser1a1N0.21,12o.

Fig. 3 is a similar view but with thelock, frame closed and the boltstill in the locked ,55 position, and 7 Fig; 4'is also a similar view but with the lock `frame closed and the bolt withdrawn and. ready to insert the-primer.

.A is the locky frame'carry'ingthe bolt A. QQ B is the lbox slide 'supporting thehopper B. l

rlhe hopper, which containsk a single row of primers, is mounted in such a position that its exit opening is situated at a greater lateral distance fromthe axis of the axial vent than is the axis ofthe bolt when the lock frame is open (see Fig. 2). The opening B2 in the box slide through which the primers fall is slightly inclined laterally toward the axial vent. The right hand edge of the mouth or opening A2 in the lock frame which is farthest from the axial vent when the frame is open is inclined at a and then serves both to guide the falling primer into the mouth or opening (Fig. 2) and to force 75 the primer next above the one referred to, back into thehopper during the closing of the lock frame (Fig. 3). The under surface of the box slide is cut away as shown at b as far as or beyond a vertical plane 8O containing the axis of the gun to prevent the primer from jamming between the inclined face a of lock frame and the box slide. In other respects the lock mechanism is similar to that set forth in our aforesaid prior specification.

` What we claim and desire to secure by Letters Patent oftheUnited States is 1.y In the lock mechanism Vof ordnance, the combination with the reotilinearly and laterally moving' lockv` frame and the bolt sleeve carried thereby, of a stationary magl azine so positioned that its' outlet opening is situated at one side of the bolt sleeve when the lock frame is in its fully open position, and inclined surfaces for guiding the plrimers from the magazine onto the bolt s eeve.

3. In lock mechanism -of ordnance, ythe combination with the look frame, the bolt sleeve carried therebyand the box VHslide nin which said look frame isslidably mounted,

Asaid look iframe and box slide having openings therein', of a stationary primer magazine so positioned that its outlet openin is situated at one side ofthe boltslee'vew enY the'lock frame is in its fully openv position, and inolined surfaces in the openings in the look frame and box slide forguiding the plrimers from the magazine onto the bolt seeve;V

. "4. In look meohanismlofuordnanoe, -the Copies 'otthis patent `:may be obtained-fo magazine being sopositioned that its outlet A opening is situated at one side of vthe-bolt sleevevvhenthe lock frame is in 'its' fully open osition.

sleeve carried therebyandthe ;boxs1ide in which said look frame is sslidablymounted, said lookY frame and box slide vhaving openings therein; ofv a* stationary yprimer maga-` zine so positioned thatits outletopenin is situated at one sideof the bolt-'sleeve'w yen 5. l n look mechanism of ordnance, they `combination With lthe lock Iframe,- lthe* bolt the look rameisinits `fully open position,

the undersurfaoe of'said box slide being out y 35 1 openingin thebox slide to a'vekr-tic`zall plane l away for a distance .extending from the containing the axis ,ofthe gun.y .Y In ltestimony lwhereof We vfaiix 011,1` signatures in .the `presence of two Witnesses. l

ARTHUR TREVOR DAWSON.

GEORGE THOMAS BUCKHAM. 'Witnesses vIIENRY AKING,

JNO. kR.I CA'svvnn1;.'

r ive cents each, addressing 4che zf Commissioner ofJ Patenti, washingtomn. *y i 

